tabstrip: Use a PaintRecorder to access the Canvas for painting.

chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc

Index: chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
diff --git a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
index a7af6502ee5e157670546370f86bfe63effd8fdb..e93920aaab971f37bfa4a3599417f5113f56ed8b 100644
--- a/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
+++ b/chrome/browser/ui/views/autofill/card_unmask_prompt_views.cc
@@ -463,10 +463,8 @@ CardUnmaskPromptViews::FadeOutView::~FadeOutView() {
 
 void CardUnmaskPromptViews::FadeOutView::PaintChildren(
     const ui::PaintContext& context) {
-  if (opacity_ > 0.99)
-    return views::View::PaintChildren(context);
-
-  ui::CompositingRecorder recorder(context, opacity_);
+  uint8_t alpha = static_cast<uint8_t>(255 * opacity_);
+  ui::CompositingRecorder recorder(context, alpha);
   views::View::PaintChildren(context);
 }